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Screening method of low-cadmium-enrichment corn variety

A screening method and low-enrichment technology, applied in the field of crop genetics and breeding, can solve the problems of poor identification accuracy, affecting the screening results of low-cadmium-enriched corn varieties, and achieve the effects of high accuracy, reduced identification cost, and improved accuracy.

Pending Publication Date: 2021-04-09
CHONGQING ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above-mentioned deficiencies existing in the prior art, the object of the present invention is to provide a screening method for low-cadmium-enriched corn varieties, to solve the problem of the poor identification accuracy of the existing screening methods for low-cadmium-enriched corn varieties, which affects the quality of low-cadmium-enriched corn varieties. Questions about filtering results

Method used

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  • Screening method of low-cadmium-enrichment corn variety
  • Screening method of low-cadmium-enrichment corn variety
  • Screening method of low-cadmium-enrichment corn variety

Examples

Experimental program
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Effect test

Embodiment 1

[0037] Embodiment 1: adopt method of the present invention, in the cadmium concentration is 3mg / kg soil, corn hybrid is screened

[0038] 1. The maize hybrids with yield-increasing potential were screened out through conventional yield tests: Yudan 30, Yudan 35, Yudan 821, Kyu 6, 20YD1751, 20YD2561, 20YD2152 and 20YD1532.

[0039] 2. Using the above-mentioned screening method for cadmium low-enrichment corn varieties to carry out cadmium enrichment identification.

[0040] 1) Seedling breeding: The hybrid seedlings will be raised on March 13, 2020.

[0041] 2) Contaminated earth pond configuration: There are 2 earth ponds in total, one of which is a polluted earth pond, and the other is a control earth pond. Except that the control earth pond does not contain cadmium solution, the other conditions are exactly the same as those of the polluted earth pond. Each earthen pond is 20m long, 4m wide and 0.5m high. Lay anti-seepage membranes around the polluted soil pool and the bot...

Embodiment 2

[0049] Embodiment 2: adopt method of the present invention, in the cadmium concentration is 10mg / kg soil, corn hybrid is screened

[0050] 1. The conventional yield test screened out maize hybrids with yield increasing potential: 20YN2563, 20YN1185, 20YN1535, 20YN1523 and 20YN2462.

[0051] 2. Using the above-mentioned screening method for cadmium low-enrichment corn varieties to carry out cadmium enrichment identification.

[0052] 1) Seedling breeding: The hybrid seedlings will be raised on March 13, 2020.

[0053] 2) Contaminated earth pond configuration: There are 2 earth ponds in total, one of which is a polluted earth pond, and the other is a control earth pond. Except that the control earth pond does not contain cadmium solution, the other conditions are exactly the same as those of the polluted earth pond. Each earthen pond is 20m long, 4m wide and 0.5m high. Lay anti-seepage membranes around the polluted soil pool and the bottom layer to prevent cadmium from polluti...

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Abstract

The invention discloses a screening method of a low-cadmium-enrichment corn variety. The method comprises the steps of seed selection, soil pool arrangement, corn soil pool planting, sample collection and sample determination. According to the method, the polluted soil pond planting technology is utilized, the cadmium concentration in a polluted soil pond is accurately regulated and controlled, the cadmium-polluted farmland soil environment is simulated, meanwhile, different batches of corn hybrids can be repeatedly identified in the polluted soil pond, and the method has the advantages of being high in screening result accuracy, low in cost, easy to operate and the like and is suitable for screening and identifying the low-cadmium-enrichment corn variety in breeding.

Description

technical field [0001] The invention relates to the technical field of crop genetics and breeding, in particular to a method for screening corn varieties with low cadmium enrichment. Background technique [0002] Cadmium (Cd) pollution in soil is a national and even global environmental problem, posing a huge threat to crop production, food security and human health. The cadmium element in the soil can be absorbed by the roots of crops and enriched in the edible parts of agricultural products, seriously affecting the quality of agricultural products. As an important food and feed crop in my country, corn is polluted by Cd to varying degrees in many planting areas, which not only reduces its yield and quality, but also poses a serious threat to human health through the food chain. Therefore, it is of great significance to breed and promote safe varieties with low accumulation of heavy metal Cd (the content of heavy metal Cd in edible parts is lower than the national standard...

Claims

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Application Information

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IPC IPC(8): A01G22/20A01G7/00A01B79/02G01N33/24G01N33/00G01N1/04
CPCA01G22/20A01G7/00A01B79/02G01N33/24G01N33/0098G01N1/04G01N33/245
Inventor 袁亮邱正高黄永川汤玲李淑君田红琳杨华周茂林
Owner CHONGQING ACAD OF AGRI SCI